To celebrate the activation of the Haldron Large Collider earlier this week, BBC Radio 4 broadcast a one-off radio adaptation of the BBC TV series "Torchwood", in which Captain Jack Harkness, Dr. Martha Jones (former Dr. Who sidekick), and Gwen Cooper (all played by the actors who play those characters on TV) are summoned to Geneva to investigate some strange occurrences related to the HLC.

The episode is available for free download, but only for until next Wednesday, so grab it while you can!